Random isotropic one-dimensional XY-model

Dynamics of the one-dimensional isotropic XY-model

One-dimensional XY model in Lorentzian random field

One-dimensional XY model in lorentzian random field

First order transition in the random two-dimensional XY model

Dynamical properties of the isotropic XY model

Numerical simulation of the XY-model on a two-dimensional random lattice